CN107367326B - Bidirectional noise testing method and device special for automobile - Google Patents
Bidirectional noise testing method and device special for automobile Download PDFInfo
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- CN107367326B CN107367326B CN201710833618.XA CN201710833618A CN107367326B CN 107367326 B CN107367326 B CN 107367326B CN 201710833618 A CN201710833618 A CN 201710833618A CN 107367326 B CN107367326 B CN 107367326B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The experimental device used in the noise testing method special for the automobile comprises a first sound level meter, a second sound level meter, a third sound level meter, a fourth sound level meter, a high-speed data acquisition card NI, a computer and a software processing system thereof, a sound insulation front detection plate, a sound insulation bottom detection plate, a rack, a 12V storage battery and a 12V-to-220V transformer; the beneficial effects of the invention are as follows: according to the invention, the sound insulation front detection plate, the first sound level meter and the second sound level meter which are arranged on the sound insulation front detection plate, the sound insulation bottom detection plate, the third sound level meter and the fourth sound level meter which are arranged on the sound insulation bottom detection plate, the high-speed data acquisition card NI, the computer and the software processing system of the computer are beneficial to increasing sound insulation effect, testing noise in two directions of the bottom and the side of the device, and through FFT data processing of time signals, the noise frequency distribution of the device can be found in time, so that reliable experimental data is provided for noise reduction of automobiles; the device is simple in structure, convenient to operate, economical and practical.
Description
Technical Field
The invention relates to the technical field of vibration and noise testing methods and devices, in particular to a method and a device for testing special noise of a bidirectional automobile.
Background
With the increasing competition of the automobile accessory processing market, the deep popularity of the environment protection concept and the continuous upgrading and application of the technology, the international automobile accessory processing part industry has the following development characteristics in recent years: matching the automobile accessory processing system and modularizing the supply trend; globalization of automobile accessory processing and purchasing; the transfer speed of the automobile accessory processing industry is increased. Automobile parts are various, the brands of automobiles are more and more nowadays, and the types of automobiles are more and more. Automobiles can be classified into passenger cars and commercial cars, wherein passenger cars refer to vehicles with less than nine seats (including driver positions), and mainly serve as passengers. In particular, passenger cars are classified into basic passenger cars, i.e., sedans, MPV models, SUV models, and other models such as pickup cards. Commercial passenger car means that the seats of the passenger car are more than nine seats, and the main function of the commercial passenger car is passenger carrying; the main function of commercial trucks is cargo. The method is specifically divided into: passenger car, truck, semitrailer, incomplete car of passenger car, incomplete car of cargo. The noise reduction of automobiles in the current society, in particular to the noise reduction of buses and passenger cars, has higher requirements, and the existing noise testing device special for the automobiles lacks a noise testing method and a noise testing device for multi-azimuth noise detection and treatment, so that the requirements of actual situations can not be met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method and a device for testing the noise special for a bidirectional automobile.
The invention is realized by the following technical scheme:
the experimental device used in the noise testing method special for the automobile comprises a first sound level meter (1), a second sound level meter (2), a third sound level meter (3), a fourth sound level meter (4), a high-speed data acquisition card NI (5), a computer and a software processing system (6), a sound insulation front detection plate (7), a sound insulation bottom detection plate (8), a rack (9), a front first detection hole (10), a front second detection hole (11), a bottom first detection hole (12), a bottom second detection hole (13), a front first sound level meter bracket (14), a front second sound level meter bracket (15), a bottom first sound level meter bracket (16), a bottom second sound level meter bracket (17), a 12V storage battery (18) and a 12V-220V transformer (19); the method is characterized in that: the high-speed data acquisition card NI (5), the computer and the software processing system (6), the storage battery (18) and the 12V-to-220V transformer (19) are fixed on the upper panel of the rack (9); the sound insulation front detection plate (7) is fixed at the front end of the frame (9) through a bolt assembly, and the bottom first detection hole (12) is fixed at the bottom of the frame (9) through a bolt assembly; the front first sound level meter bracket (14) is fixedly connected with a front first detection hole (10) of the sound insulation front detection plate (7), and the front second sound level meter bracket (15) is fixedly connected with a front second detection hole (11) of the sound insulation front detection plate (7); the bottom first sound level meter bracket (16) is fixedly connected to a bottom first detection hole (12) of the sound insulation bottom detection plate (8), and the bottom second sound level meter bracket (17) is fixedly connected to a bottom second detection hole (13) of the sound insulation bottom detection plate (8); the first sound level meter (1), the second sound level meter (2), the third sound level meter (3) and the fourth sound level meter (4) are respectively installed on a front first sound level meter bracket (14), a front second sound level meter bracket (15), a bottom first sound level meter bracket (16) and a bottom second sound level meter bracket (17), the detection heads of the first sound level meter (1) and the second sound level meter (2) respectively penetrate through a front first detection hole (10) and a front second detection hole (11), the detection heads are outwards arranged, and the detection heads of the third sound level meter (3) and the fourth sound level meter (4) respectively penetrate through a bottom first detection hole (12) and a bottom second detection hole (13), and the detection heads are downwards arranged.
As a preferable technical scheme of the invention, signal wires of the first sound level meter (1), the second sound level meter (2), the third sound level meter (3) and the fourth sound level meter (4) are electrically connected with four input ends of the high-speed data acquisition card NI (5); the high-speed data acquisition card NI (5) is electrically connected with the computer and the software processing system (6) thereof through a USB line; the power wires of the first sound level meter (1), the second sound level meter (2), the third sound level meter (3), the fourth sound level meter (4) and the high-speed data acquisition card NI (5) are electrically connected with the 12V storage battery (18); the computer and the software processing system (6) are electrically connected with a 12V-to-220V transformer (19).
As a preferable technical scheme of the invention, the sound insulation front detection plate (7) and the sound insulation bottom detection plate (8) are of a multi-layer sound insulation material plate bonding structure.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, by arranging the sound insulation front detection plate (7), the first sound level meter (1) and the second sound level meter (2) which are arranged on the sound insulation front detection plate, the sound insulation bottom detection plate (8), the third sound level meter (3) and the fourth sound level meter (4) which are arranged on the sound insulation bottom detection plate, the high-speed data acquisition card NI (5), the computer and the software processing system (6) thereof, the sound insulation effect can be increased, the noise in the two directions of the bottom and the side of the device can be tested, the noise frequency distribution of the device can be found timely through FFT data processing of time signals, and reliable experimental data is provided for noise reduction of automobiles; the device is simple in structure, convenient to operate, economical and practical.
Drawings
Fig. 1 is a schematic view of the structure of the present invention, fig. 2 is a top view of an arrangement of four sound level meters, and fig. 3 is a left side view of the arrangement of four sound level meters.
In the figure: 1. a first sound level meter; 2. a second sound stage meter; 3. a third sound level meter; 4. a fourth sound stage meter; 5. a high-speed data acquisition card NI; 6. a computer and a software processing system thereof; 7. a sound-deadening front detection plate; 8. a soundproof bottom detection plate; 9. a frame; 10. a front first detection hole; 11. a front second detection hole; 12. a bottom first detection hole; 13. a bottom second detection hole; 14. a front first sound level meter bracket; 15. a front second acoustic stage meter bracket; 16. a bottom first sound level meter bracket; 17. a bottom second acoustic stage meter bracket; 18. a 12V battery; 19. a 12V to 220V transformer (19).
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, 2 and 3, fig. 1 is a schematic structural diagram of the present invention, fig. 2 is a top layout view of four sound level gauges, and fig. 3 is a left-side layout view of the four sound level gauges.
The experimental device used by the noise testing method special for the automobile comprises a first sound level meter (1), a second sound level meter (2), a third sound level meter (3), a fourth sound level meter (4), a high-speed data acquisition card NI (5), a computer and a software processing system (6), a sound insulation front detection plate (7), a sound insulation bottom detection plate (8), a rack (9), a front first detection hole (10), a front second detection hole (11), a bottom first detection hole (12), a bottom second detection hole (13), a front first sound level meter bracket (14), a front second sound level meter bracket (15), a bottom first sound level meter bracket (16), a bottom second sound level meter bracket (17), a 12V storage battery (18) and a 12V-to-220V transformer (19); the method is characterized in that: the high-speed data acquisition card NI (5), the computer and the software processing system (6), the storage battery (18) and the 12V-to-220V transformer (19) are fixed on the upper panel of the rack (9); the sound insulation front detection plate (7) is fixed at the front end of the frame (9) through a bolt assembly, and the bottom first detection hole (12) is fixed at the bottom of the frame (9) through a bolt assembly; the front first sound level meter bracket (14) is fixedly connected with a front first detection hole (10) of the sound insulation front detection plate (7), and the front second sound level meter bracket (15) is fixedly connected with a front second detection hole (11) of the sound insulation front detection plate (7); the bottom first sound level meter bracket (16) is fixedly connected to a bottom first detection hole (12) of the sound insulation bottom detection plate (8), and the bottom second sound level meter bracket (17) is fixedly connected to a bottom second detection hole (13) of the sound insulation bottom detection plate (8); the first sound level meter (1), the second sound level meter (2), the third sound level meter (3) and the fourth sound level meter (4) are respectively installed on a front first sound level meter bracket (14), a front second sound level meter bracket (15), a bottom first sound level meter bracket (16) and a bottom second sound level meter bracket (17), the detection heads of the first sound level meter (1) and the second sound level meter (2) respectively penetrate through a front first detection hole (10) and a front second detection hole (11), the detection heads are outwards arranged, and the detection heads of the third sound level meter (3) and the fourth sound level meter (4) respectively penetrate through a bottom first detection hole (12) and a bottom second detection hole (13), and the detection heads are downwards arranged.
The noise testing method special for the automobile is characterized by comprising the following steps of: the signal wires of the first sound level meter (1), the second sound level meter (2), the third sound level meter (3) and the fourth sound level meter (4) are electrically connected with four input ends of the high-speed data acquisition card NI (5); the high-speed data acquisition card NI (5) is electrically connected with the computer and the software processing system (6) thereof through a USB line; the power wires of the first sound level meter (1), the second sound level meter (2), the third sound level meter (3), the fourth sound level meter (4) and the high-speed data acquisition card NI (5) are electrically connected with the 12V storage battery (18); the computer and the software processing system (6) are electrically connected with a 12V-to-220V transformer (19).
The noise testing method special for the automobile is characterized by comprising the following steps of: the noise detection method comprises the following steps:
1) The noise testing device is moved to an automobile with noise to be detected, the automobile is started, the speed of the automobile is increased to the speed to be tested, meanwhile, the power supply of the noise testing device is turned on, a data acquisition button of a first sound level meter (1) of a computer and a software processing system (6) thereof is clicked, data are acquired and stored, a first time domain diagram of the automobile noise is obtained, and then the first time domain diagram of the automobile noise is converted into a first frequency domain diagram of the automobile noise through FFT (fast Fourier transform);
2) Clicking a data acquisition button of a second sound stage meter (2) of the computer and a software processing system (6) thereof to acquire and store data, obtaining a second time domain diagram of the automobile noise, and converting the second time domain diagram of the automobile noise into a second frequency domain diagram of the automobile noise through FFT (fast Fourier transform);
3) Clicking a data acquisition button of a third sound level meter (3) of a computer and a software processing system (6) thereof to start acquiring and storing data to obtain a third time domain diagram of the automobile noise, and converting the third time domain diagram of the automobile noise into a third frequency domain diagram of the automobile noise through FFT (fast Fourier transform);
4) Clicking a data acquisition button of a fourth sound level meter (4) of the computer and a software processing system (6) thereof to start acquiring and storing data to obtain a fourth time domain diagram of the automobile noise, and converting the fourth time domain diagram of the automobile noise into a fourth frequency domain diagram of the automobile noise through FFT (fast Fourier transform);
5) According to the first frequency domain diagram of the automobile noise, the second frequency domain diagram of the automobile noise, the third frequency domain diagram of the automobile noise and the fourth frequency domain diagram of the automobile noise, the frequency band with the sound intensity being more than 50mV is a frequency band with serious noise occurrence, the frequency band with the sound intensity being 30-50 mV is a secondary frequency band with noise occurrence, and the frequency band with the sound intensity being less than 30mV is a frequency band with negligible noise; the frequency distribution and the corresponding sound intensity of the automobile noise are judged by observing the first frequency domain diagram of the automobile noise, the second frequency domain diagram of the automobile noise, the third frequency domain diagram of the automobile noise and the fourth frequency domain diagram of the automobile noise, and experimental data are provided for judging main factors affecting the automobile noise.
The noise testing method special for the automobile is characterized by comprising the following steps of: the sound insulation front detection plate (7) and the sound insulation bottom detection plate (8) are of multi-layer sound insulation material plate bonding structures.
The experimental device adopted by the noise testing method special for the automobile comprises a first sound level meter (1), a second sound level meter (2), a third sound level meter (3), a fourth sound level meter (4), a high-speed data acquisition card NI (5), a computer and a software processing system (6), a sound insulation front detection plate (7), a sound insulation bottom detection plate (8), a rack (9), a front first detection hole (10), a front second detection hole (11), a bottom first detection hole (12), a bottom second detection hole (13), a front first sound level meter bracket (14), a front second sound level meter bracket (15), a bottom first sound level meter bracket (16), a bottom second sound level meter bracket (17), a 12V storage battery (18) and a 12V-to-220V transformer (19); the method is characterized in that: the high-speed data acquisition card NI (5), the computer and the software processing system (6), the storage battery (18) and the 12V-to-220V transformer (19) are fixed on the upper panel of the rack (9); the sound insulation front detection plate (7) is fixed at the front end of the frame (9) through a bolt assembly, and the bottom first detection hole (12) is fixed at the bottom of the frame (9) through a bolt assembly; the front first sound level meter bracket (14) is fixedly connected with a front first detection hole (10) of the sound insulation front detection plate (7), and the front second sound level meter bracket (15) is fixedly connected with a front second detection hole (11) of the sound insulation front detection plate (7); the bottom first sound level meter bracket (16) is fixedly connected to a bottom first detection hole (12) of the sound insulation bottom detection plate (8), and the bottom second sound level meter bracket (17) is fixedly connected to a bottom second detection hole (13) of the sound insulation bottom detection plate (8); the first sound level meter (1), the second sound level meter (2), the third sound level meter (3) and the fourth sound level meter (4) are respectively installed on a front first sound level meter bracket (14), a front second sound level meter bracket (15), a bottom first sound level meter bracket (16) and a bottom second sound level meter bracket (17), the detection heads of the first sound level meter (1) and the second sound level meter (2) respectively penetrate through a front first detection hole (10) and a front second detection hole (11), the detection heads are outwards arranged, and the detection heads of the third sound level meter (3) and the fourth sound level meter (4) respectively penetrate through a bottom first detection hole (12) and a bottom second detection hole (13), and the detection heads are downwards arranged.
The special noise test experimental device for the automobile is characterized in that: the signal wires of the first sound level meter (1), the second sound level meter (2), the third sound level meter (3) and the fourth sound level meter (4) are electrically connected with four input ends of the high-speed data acquisition card NI (5); the high-speed data acquisition card NI (5) is electrically connected with the computer and the software processing system (6) thereof through a USB line; the power wires of the first sound level meter (1), the second sound level meter (2), the third sound level meter (3), the fourth sound level meter (4) and the high-speed data acquisition card NI (5) are electrically connected with the 12V storage battery (18); the computer and the software processing system (6) are electrically connected with a 12V-to-220V transformer (19).
The special noise test experimental device for the automobile is characterized in that: the sound insulation front detection plate (7) and the sound insulation bottom detection plate (8) are of multi-layer sound insulation material plate bonding structures.
When the device is used on site, an operator moves the device to the automobile noise detection position integrally, and then places the device integrally, so that the noise testing work special for the automobile can be performed.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The experimental device used by the method comprises a first sound level meter (1), a second sound level meter (2), a third sound level meter (3), a fourth sound level meter (4), a high-speed data acquisition card NI (5), a computer and a software processing system (6), a sound insulation front detection plate (7), a sound insulation bottom detection plate (8), a rack (9), a front first detection hole (10), a front second detection hole (11), a bottom first detection hole (12), a bottom second detection hole (13), a front first sound level meter bracket (14), a front second sound level meter bracket (15), a bottom first sound level meter bracket (16), a bottom second sound level meter bracket (17), a 12V storage battery (18) and a 12V-to-220V transformer (19); the method is characterized in that: the high-speed data acquisition card NI (5), the computer and the software processing system (6), the storage battery (18) and the 12V-to-220V transformer (19) are fixed on the upper panel of the rack (9); the sound insulation front detection plate (7) is fixed at the front end of the frame (9) through a bolt assembly, and the bottom first detection hole (12) is fixed at the bottom of the frame (9) through a bolt assembly; the front first sound level meter bracket (14) is fixedly connected with a front first detection hole (10) of the sound insulation front detection plate (7), and the front second sound level meter bracket (15) is fixedly connected with a front second detection hole (11) of the sound insulation front detection plate (7); the bottom first sound level meter bracket (16) is fixedly connected to a bottom first detection hole (12) of the sound insulation bottom detection plate (8), and the bottom second sound level meter bracket (17) is fixedly connected to a bottom second detection hole (13) of the sound insulation bottom detection plate (8); the first sound level meter (1), the second sound level meter (2), the third sound level meter (3) and the fourth sound level meter (4) are respectively arranged on a front first sound level meter bracket (14), a front second sound level meter bracket (15), a bottom first sound level meter bracket (16) and a bottom second sound level meter bracket (17), the detection heads of the first sound level meter (1) and the second sound level meter (2) respectively penetrate through a front first detection hole (10) and a front second detection hole (11), the detection heads are outwards arranged, the detection heads of the third sound level meter (3) and the fourth sound level meter (4) respectively penetrate through a bottom first detection hole (12) and a bottom second detection hole (13), and the detection heads are downwards arranged; the noise detection method comprises the steps of 1) moving the noise testing device onto an automobile with noise to be detected, starting the automobile, increasing the speed of the automobile to the speed to be tested, simultaneously turning on the power supply of the noise testing device, clicking a data acquisition button of a first sound level meter (1) of a computer and a software processing system (6) thereof, starting to acquire and store data to obtain a first time domain diagram of the automobile noise, and converting the first time domain diagram of the automobile noise into a first frequency domain diagram of the automobile noise through FFT (fast Fourier transform); 2) Clicking a data acquisition button of a second sound stage meter (2) of the computer and a software processing system (6) thereof to acquire and store data, obtaining a second time domain diagram of the automobile noise, and converting the second time domain diagram of the automobile noise into a second frequency domain diagram of the automobile noise through FPT fast Fourier transform; 3) Clicking a data acquisition button of a third sound level meter (3) of a computer and a software processing system (6) thereof to start acquiring and storing data to obtain a third time domain diagram of the automobile noise, and converting the third time domain diagram of the automobile noise into a third Yingdomain diagram of the automobile noise through FFT fast Fourier transform; 4) Clicking a data acquisition button of a fourth sound level meter (4) of the computer and a software processing system (6) thereof to start acquiring and storing data to obtain a fourth time domain diagram of automobile noise, and converting the fourth time domain diagram of the automobile noise into a fourth frequency domain diagram of automobile voice through FFT (fast Fourier transform); 5) According to a first frequency domain diagram of automobile noise, a second frequency domain diagram of automobile noise, a third frequency domain diagram of automobile noise and a fourth frequency domain diagram of automobile noise, a frequency band with sound intensity higher than 50mV is a frequency band with serious noise occurrence, a frequency band with sound intensity between 30 and 50mV is a secondary frequency band with noise occurrence, and a frequency band with sound intensity lower than 30mV is a frequency band with negligible noise occurrence; the frequency distribution and the corresponding sound intensity of the automobile noise are judged by observing the first frequency domain diagram of the automobile noise, the second frequency domain diagram of the automobile noise, the third frequency domain diagram of the automobile noise and the fourth frequency domain diagram of the automobile noise, and experimental data are provided for judging main factors affecting the automobile noise.
2. The method for testing the noise special for the bidirectional automobile according to claim 1, wherein the method comprises the following steps of: the signal wires of the first sound level meter (1), the second sound level meter (2), the third sound level meter (3) and the fourth sound level meter (4) are electrically connected with four input ends of the high-speed data acquisition card NI (5); the high-speed data acquisition card NI (5) is electrically connected with the computer and the software processing system (6) thereof through a USB line; the power wires of the first sound level meter (1), the second sound level meter (2), the third sound level meter (3), the fourth sound level meter (4) and the high-speed data acquisition card NI (5) are electrically connected with the 12V storage battery (18); the computer and the software processing system (6) are electrically connected with a 12V-to-220V transformer (19).
3. The method for testing the noise special for the bidirectional automobile according to claim 1, wherein the method comprises the following steps of: the sound insulation front detection plate (7) and the sound insulation bottom detection plate (8) are of multi-layer sound insulation material plate bonding structures.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000050916A (en) * | 1999-01-15 | 2000-08-05 | 정몽규 | Apparatus for examine noise of automobile |
| CN103063936A (en) * | 2012-12-19 | 2013-04-24 | 中国电力科学研究院 | Spot low-voltage power line carrier channel noise testing system and method thereof |
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2017
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000050916A (en) * | 1999-01-15 | 2000-08-05 | 정몽규 | Apparatus for examine noise of automobile |
| CN103063936A (en) * | 2012-12-19 | 2013-04-24 | 中国电力科学研究院 | Spot low-voltage power line carrier channel noise testing system and method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 基于LabVIEW的汽车座椅电机的噪音测试与评定;苏瑜等;《机械设计与制造》(第03期);全文 * |
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